diff --git a/test_runner/src/main/kotlin/com/google/api/client/http/GoogleApiLogger.kt b/test_runner/src/main/kotlin/com/google/api/client/http/GoogleApiLogger.kt
index e4978e457d..87702e1776 100644
--- a/test_runner/src/main/kotlin/com/google/api/client/http/GoogleApiLogger.kt
+++ b/test_runner/src/main/kotlin/com/google/api/client/http/GoogleApiLogger.kt
@@ -1,10 +1,12 @@
 package com.google.api.client.http
 
 import com.google.auth.oauth2.ComputeEngineCredentials
+import ftl.log.FlankLogger
 import java.util.logging.Level
 import java.util.logging.Logger
 import java.util.logging.SimpleFormatter
 import java.util.logging.StreamHandler
+import kotlin.properties.Delegates
 
 // Used to enable cURL logging of the Java client API requests.
 //
@@ -12,8 +14,13 @@ import java.util.logging.StreamHandler
 //
 // gcloud alpha firebase test ios models list --log-http
 //
-object GoogleApiLogger {
-    fun logAllToStdout() {
+object GoogleApiLogger : FlankLogger {
+
+    override var isEnabled: Boolean by Delegates.observable(false) { _, _, enable ->
+        if (enable) logAllToStdout()
+    }
+
+    private fun logAllToStdout() {
         val logger = HttpTransport.LOGGER
         logger.level = Level.ALL
 
diff --git a/test_runner/src/main/kotlin/ftl/Main.kt b/test_runner/src/main/kotlin/ftl/Main.kt
index 31c648a218..544e470a40 100644
--- a/test_runner/src/main/kotlin/ftl/Main.kt
+++ b/test_runner/src/main/kotlin/ftl/Main.kt
@@ -6,6 +6,7 @@ import ftl.cli.firebase.CancelCommand
 import ftl.cli.firebase.RefreshCommand
 import ftl.cli.firebase.test.AndroidCommand
 import ftl.cli.firebase.test.IosCommand
+import ftl.log.setDebugLogging
 import ftl.util.Utils.readRevision
 import ftl.util.Utils.readVersion
 import picocli.CommandLine
@@ -35,6 +36,12 @@ class Main : Runnable {
     @CommandLine.Option(names = ["-v", "--version"], description = ["Prints the version"])
     private var printVersion = false
 
+    @CommandLine.Option(
+        names = ["--debug"],
+        description = ["Enables debug logging"]
+    )
+    fun debug(enabled: Boolean) = setDebugLogging(enabled)
+
     companion object {
         @JvmStatic
         fun main(args: Array<String>) {
diff --git a/test_runner/src/main/kotlin/ftl/args/AndroidArgs.kt b/test_runner/src/main/kotlin/ftl/args/AndroidArgs.kt
index e5f4c9098f..3a5cece0fd 100644
--- a/test_runner/src/main/kotlin/ftl/args/AndroidArgs.kt
+++ b/test_runner/src/main/kotlin/ftl/args/AndroidArgs.kt
@@ -72,7 +72,6 @@ class AndroidArgs(
     override val disableSharding = cli?.disableSharding ?: flank.disableSharding
     override val project = cli?.project ?: flank.project
     override val localResultDir = cli?.localResultDir ?: flank.localResultDir
-    override val debug = cli?.debug ?: flank.debug
 
     private val androidFlank = androidFlankYml.flank
     val additionalAppTestApks = cli?.additionalAppTestApks ?: androidFlank.additionalAppTestApks
diff --git a/test_runner/src/main/kotlin/ftl/args/IArgs.kt b/test_runner/src/main/kotlin/ftl/args/IArgs.kt
index 5684babbc4..48c3583610 100644
--- a/test_runner/src/main/kotlin/ftl/args/IArgs.kt
+++ b/test_runner/src/main/kotlin/ftl/args/IArgs.kt
@@ -27,7 +27,6 @@ interface IArgs {
     val filesToDownload: List<String>
     val disableSharding: Boolean
     val localResultDir: String
-    val debug: Boolean
 
     fun useLocalResultDir() = localResultDir != FlankYmlParams.defaultLocalResultDir
 
diff --git a/test_runner/src/main/kotlin/ftl/args/IosArgs.kt b/test_runner/src/main/kotlin/ftl/args/IosArgs.kt
index 35ceadaf38..cb3cf9416d 100644
--- a/test_runner/src/main/kotlin/ftl/args/IosArgs.kt
+++ b/test_runner/src/main/kotlin/ftl/args/IosArgs.kt
@@ -60,7 +60,6 @@ class IosArgs(
     override val disableSharding = cli?.disableSharding ?: flank.disableSharding
     override val project = cli?.project ?: flank.project
     override val localResultDir = cli?.localResultsDir ?: flank.localResultDir
-    override val debug = cli?.debug ?: flank.debug
 
     private val iosFlank = iosFlankYml.flank
     val testTargets = cli?.testTargets ?: iosFlank.testTargets.filterNotNull()
diff --git a/test_runner/src/main/kotlin/ftl/args/yml/FlankYml.kt b/test_runner/src/main/kotlin/ftl/args/yml/FlankYml.kt
index a9f0ec4d9d..3103c83ad0 100644
--- a/test_runner/src/main/kotlin/ftl/args/yml/FlankYml.kt
+++ b/test_runner/src/main/kotlin/ftl/args/yml/FlankYml.kt
@@ -34,10 +34,7 @@ class FlankYmlParams(
     val project: String = ArgsHelper.getDefaultProjectId() ?: "",
 
     @field:JsonProperty("local-result-dir")
-    val localResultDir: String = defaultLocalResultDir,
-
-    @field:JsonProperty("debug")
-    val debug: Boolean = false
+    val localResultDir: String = defaultLocalResultDir
 ) {
     companion object : IYmlKeys {
         override val keys = listOf(
diff --git a/test_runner/src/main/kotlin/ftl/cli/firebase/test/android/AndroidRunCommand.kt b/test_runner/src/main/kotlin/ftl/cli/firebase/test/android/AndroidRunCommand.kt
index 4983acc47b..89db2b15a9 100644
--- a/test_runner/src/main/kotlin/ftl/cli/firebase/test/android/AndroidRunCommand.kt
+++ b/test_runner/src/main/kotlin/ftl/cli/firebase/test/android/AndroidRunCommand.kt
@@ -68,12 +68,6 @@ class AndroidRunCommand : Runnable {
     @Option(names = ["--dry"], description = ["Dry run on mock server"])
     var dryRun: Boolean = false
 
-    @Option(
-        names = ["--debug"],
-        description = ["Enable debug logging. Will print additional debugging output to console if enabled"]
-    )
-    var debug: Boolean? = null
-
     // Flank specific
 
     @Option(
diff --git a/test_runner/src/main/kotlin/ftl/cli/firebase/test/ios/IosRunCommand.kt b/test_runner/src/main/kotlin/ftl/cli/firebase/test/ios/IosRunCommand.kt
index b235144dbe..1140c7d727 100644
--- a/test_runner/src/main/kotlin/ftl/cli/firebase/test/ios/IosRunCommand.kt
+++ b/test_runner/src/main/kotlin/ftl/cli/firebase/test/ios/IosRunCommand.kt
@@ -61,12 +61,6 @@ class IosRunCommand : Runnable {
     @Option(names = ["--dry"], description = ["Dry run on mock server"])
     var dryRun: Boolean = false
 
-    @Option(
-        names = ["--debug"],
-        description = ["Enable debug logging. Will print additional debugging output to console if enabled"]
-    )
-    var debug: Boolean? = null
-
     // Flank specific
 
     @Option(
diff --git a/test_runner/src/main/kotlin/ftl/config/FtlConstants.kt b/test_runner/src/main/kotlin/ftl/config/FtlConstants.kt
index 1eb5f34d2b..4d19c6b0de 100644
--- a/test_runner/src/main/kotlin/ftl/config/FtlConstants.kt
+++ b/test_runner/src/main/kotlin/ftl/config/FtlConstants.kt
@@ -1,7 +1,5 @@
 package ftl.config
 
-import ch.qos.logback.classic.Level
-import ch.qos.logback.classic.Logger
 import com.bugsnag.Bugsnag
 import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport
 import com.google.api.client.googleapis.util.Utils
@@ -23,7 +21,6 @@ import java.io.IOException
 import java.nio.file.Path
 import java.nio.file.Paths
 import java.util.Date
-import org.slf4j.LoggerFactory
 
 object FtlConstants {
     var useMock = false
@@ -60,7 +57,6 @@ object FtlConstants {
 
     init {
         bugsnag.setAppVersion(readRevision())
-        (LoggerFactory.getLogger(Bugsnag::class.java) as Logger).level = Level.OFF
     }
 
     val httpTransport: NetHttpTransport by lazy {
diff --git a/test_runner/src/main/kotlin/ftl/gc/UserAuth.kt b/test_runner/src/main/kotlin/ftl/gc/UserAuth.kt
index 599338dd1e..41ebb27c13 100644
--- a/test_runner/src/main/kotlin/ftl/gc/UserAuth.kt
+++ b/test_runner/src/main/kotlin/ftl/gc/UserAuth.kt
@@ -1,7 +1,5 @@
 package ftl.gc
 
-import ch.qos.logback.classic.Level
-import ch.qos.logback.classic.Logger
 import com.google.auth.oauth2.ClientId
 import com.google.auth.oauth2.MemoryTokensStorage
 import com.google.auth.oauth2.UserAuthorizer
@@ -23,13 +21,12 @@ import java.nio.file.Paths
 import java.util.concurrent.TimeUnit
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.runBlocking
-import org.slf4j.LoggerFactory
 
 class UserAuth {
 
     companion object {
         private val home = System.getProperty("user.home")!!
-        private val dotFlank = Paths.get(home, ".flank/")!!
+        private val dotFlank = Paths.get(home, ".flank/")
         val userToken: Path = Paths.get(dotFlank.toString(), "UserToken")
 
         fun exists() = userToken.toFile().exists()
@@ -40,13 +37,6 @@ class UserAuth {
         }
     }
 
-    // Silence Jetty logging.
-    private val logger = LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME) as Logger
-
-    init {
-        logger.level = Level.OFF
-    }
-
     private var waitingForUserAuth = true
 
     private val server = embeddedServer(Netty, 8085) {
diff --git a/test_runner/src/main/kotlin/ftl/log/FlankLogger.kt b/test_runner/src/main/kotlin/ftl/log/FlankLogger.kt
new file mode 100644
index 0000000000..294a20ede7
--- /dev/null
+++ b/test_runner/src/main/kotlin/ftl/log/FlankLogger.kt
@@ -0,0 +1,5 @@
+package ftl.log
+
+interface FlankLogger {
+    var isEnabled: Boolean
+}
diff --git a/test_runner/src/main/kotlin/ftl/log/LogbackLogger.kt b/test_runner/src/main/kotlin/ftl/log/LogbackLogger.kt
new file mode 100644
index 0000000000..1933b1694a
--- /dev/null
+++ b/test_runner/src/main/kotlin/ftl/log/LogbackLogger.kt
@@ -0,0 +1,20 @@
+package ftl.log
+
+import ch.qos.logback.classic.Level
+import ch.qos.logback.classic.Logger
+import org.slf4j.LoggerFactory.getLogger
+import kotlin.properties.Delegates
+
+sealed class LogbackLogger(private val logger: Logger) : FlankLogger {
+
+    constructor(logger: Any) : this(logger as Logger)
+
+    override var isEnabled: Boolean by Delegates.observable(false) { _, _, enable ->
+        logger.level = if (enable)
+            Level.ALL else
+            Level.OFF
+    }
+
+    object Root : LogbackLogger(getLogger(Logger.ROOT_LOGGER_NAME))
+    object Bugsnag : LogbackLogger(getLogger(Bugsnag::class.java))
+}
diff --git a/test_runner/src/main/kotlin/ftl/log/Loggers.kt b/test_runner/src/main/kotlin/ftl/log/Loggers.kt
new file mode 100644
index 0000000000..bc830c57bc
--- /dev/null
+++ b/test_runner/src/main/kotlin/ftl/log/Loggers.kt
@@ -0,0 +1,13 @@
+package ftl.log
+
+import com.google.api.client.http.GoogleApiLogger
+
+private val LOGGERS = listOf(
+    LogbackLogger.Root,
+    LogbackLogger.Bugsnag,
+    GoogleApiLogger
+)
+
+fun setDebugLogging(enable: Boolean) = LOGGERS.forEach { logger ->
+    logger.isEnabled = enable
+}
diff --git a/test_runner/src/main/kotlin/ftl/mock/MockServer.kt b/test_runner/src/main/kotlin/ftl/mock/MockServer.kt
index fbd8b0a7f7..fc1e16cd82 100644
--- a/test_runner/src/main/kotlin/ftl/mock/MockServer.kt
+++ b/test_runner/src/main/kotlin/ftl/mock/MockServer.kt
@@ -1,7 +1,5 @@
 package ftl.mock
 
-import ch.qos.logback.classic.Level
-import ch.qos.logback.classic.Logger
 import com.google.api.services.testing.model.AndroidDevice
 import com.google.api.services.testing.model.AndroidDeviceCatalog
 import com.google.api.services.testing.model.Environment
@@ -27,6 +25,7 @@ import com.google.gson.GsonBuilder
 import com.google.gson.LongSerializationPolicy
 import ftl.config.FtlConstants
 import ftl.config.FtlConstants.JSON_FACTORY
+import ftl.log.LogbackLogger
 import ftl.util.Bash
 import ftl.util.StepOutcome.failure
 import ftl.util.StepOutcome.inconclusive
@@ -47,20 +46,14 @@ import io.ktor.server.netty.Netty
 import java.nio.file.Files
 import java.nio.file.Paths
 import java.util.concurrent.atomic.AtomicInteger
-import org.slf4j.LoggerFactory.getLogger
 import java.net.BindException
 
 object MockServer {
 
     private val matrixIdCounter: AtomicInteger = AtomicInteger(0)
     const val port = 8080
-    private val logger = getLogger(Logger.ROOT_LOGGER_NAME) as Logger
     private var isStarted: Boolean = false
 
-    init {
-        logger.level = Level.OFF
-    }
-
     private inline fun <reified T> loadCatalog(fileName: String): T {
         val jsonPath = Paths.get("./src/test/kotlin/ftl/fixtures/$fileName")
         if (!jsonPath.toFile().exists()) throw RuntimeException("Path doesn't exist: $fileName")
@@ -246,6 +239,9 @@ object MockServer {
 
     fun start() {
         if (isStarted) return
+        val loggingEnabled = LogbackLogger.Root.isEnabled
+        // Disable mock server initialization logs
+        LogbackLogger.Root.isEnabled = false
         val server = application
         try {
             server.start(wait = false)
@@ -256,6 +252,7 @@ object MockServer {
             Thread.sleep(2000)
             server.start(wait = false)
         }
+        LogbackLogger.Root.isEnabled = loggingEnabled
         isStarted = true
         FtlConstants.useMock = true
         TestArtifact.checkFixtures
diff --git a/test_runner/src/test/kotlin/Debug.kt b/test_runner/src/test/kotlin/Debug.kt
index ec50c803e9..a796254ee2 100644
--- a/test_runner/src/test/kotlin/Debug.kt
+++ b/test_runner/src/test/kotlin/Debug.kt
@@ -9,13 +9,14 @@ fun main() {
     // run "gradle check" to generate required fixtures
     val projectId = System.getenv("FLANK_PROJECT_ID")
         ?: "YOUR PROJECT ID"
-    val quantity = "multiple"
+    val quantity = "single"
     val type = "success"
 
     CommandLine(Main()).execute(
+        "--debug",
         "firebase", "test",
         "android", "run",
-        "--dry",
+//        "--dry",
         "-c=src/test/kotlin/ftl/fixtures/test_app_cases/flank-$quantity-$type.yml",
         "--project=$projectId"
     )
diff --git a/test_runner/src/test/kotlin/ftl/MainTest.kt b/test_runner/src/test/kotlin/ftl/MainTest.kt
index 88869b3fca..56c4fca117 100644
--- a/test_runner/src/test/kotlin/ftl/MainTest.kt
+++ b/test_runner/src/test/kotlin/ftl/MainTest.kt
@@ -24,7 +24,8 @@ class MainTest {
     private fun assertMainHelpStrings(output: String) {
         assertThat(output.normalizeLineEnding()).contains(
             "flank.jar\n" +
-                " [-v] [COMMAND]\n" +
+                " [-v] [--debug] [COMMAND]\n" +
+                "      --debug     Enables debug logging\n" +
                 "  -v, --version   Prints the version\n" +
                 "Commands:\n" +
                 "  firebase\n" +
@@ -40,11 +41,26 @@ class MainTest {
         return systemOutRule.log.normalizeLineEnding() + systemErrRule.log.normalizeLineEnding()
     }
 
+    private fun unknownOption(option: String) = "Unknown option: '$option'"
+
     @Test
-    fun mainCLIVersionCommand() {
+    fun mainCLIVersionOption() {
+        val option = "-v"
         assertThat(
-            runCommand("-v")
-        ).isNotEmpty()
+            runCommand(option)
+        ).doesNotContain(
+            unknownOption(option)
+        )
+    }
+
+    @Test
+    fun mainCLIDebugOption() {
+        val option = "--debug"
+        assertThat(
+            runCommand(option)
+        ).doesNotContain(
+            unknownOption(option)
+        )
     }
 
     @Test
@@ -54,8 +70,9 @@ class MainTest {
 
     @Test
     fun mainCLIErrorsOnUnknownFlag() {
-        val output = runCommand("-unknown-flag")
-        assertThat(output).contains("Unknown option: '-unknown-flag'")
+        val option = "-unknown-flag"
+        val output = runCommand(option)
+        assertThat(output).contains(unknownOption(option))
         assertMainHelpStrings(output)
     }